使用 shiny 在 R 中创建交互式 Leaflet 地图
Creating interactive Leaflet map in R with shiny
我用传单创建了一个闪亮的应用程序,它运行良好。
library(shiny)
library(shinythemes)
library(leaflet)
ui2 <- fluidPage(theme = shinytheme("united"), tabsetPanel(
tabPanel(
titlePanel("titel"),
mainPanel(
leafletOutput(outputId = "mymap")),
sidebarPanel(
fluidRow(
dateRangeInput("a", h4("date"),language = "en",separator = " to "),
selectInput("select", h4("location"),
c(data8$city)),
submitButton("search"))
))
)
)
server <- function(input, output) {
popupa <- paste(titel)
output$mymap <- renderLeaflet({
leaflet(data8) %>%
addTiles() %>%
addMarkers(lng = ~lng, lat = ~lat, popup = popupa)
})
}
shinyApp(ui2, server)
但目前我正在尝试在我显示的位置上添加 dateRangeInput
到 filter(date_start)
。但我不知道如何将我的 dateRangeInput
和 selectInput
连接到服务器部分的传单功能。此外,在地图下方应该有一个 table,其中包含从地图中筛选出的位置 - 这可能吗?
我使用的数据框如下所示:
title=c("Event1","Event2")
lng=c(23.3, 23.3)
lat=c(30, 40)
city=c("Berlin", "Hamburg" )
zip=c(39282, 27373)
date_start=c("2018-05-28","2018-05-28")
date_end=c("2018-06-27","2018-08-03")
data8 <- data.frame(title, lng, lat, city, zip, date_start, date_end)
有谁知道如何完成这项工作?感谢您的帮助!
问候
你可以试试这个:
ui2 <- fluidPage(theme = shinytheme("united"), tabsetPanel(
tabPanel(
titlePanel("titel"),
mainPanel(
leafletOutput(outputId = "mymap"),
dataTableOutput("mytable")),
sidebarPanel(
fluidRow(
dateRangeInput("a", h4("date"),language = "en",separator = " to "),
selectInput("selectLoc", h4("location"),
as.character(data8$city)),
submitButton("search"))
))
)
)
server <- function(input, output) {
popupa <- paste("titel")
datatoPlot <- reactive({
date_start <- as.character(input$a[1])
date_end <- as.character(input$a[2])
data8$date_start <- as.Date(data8$date_start, format = "%Y-%m-%d")
data8 <- data8[as.Date(data8$date_start) >= date_start & as.Date(data8$date_start) <= date_end, ]
data8 <- data8 %>% dplyr::filter(city == input$selectLoc)
})
output$mymap <- renderLeaflet({
leaflet(datatoPlot()) %>%
addTiles() %>%
addMarkers(lng = ~lng, lat = ~lat, popup = popupa)
})
output$mytable <- renderDataTable(datatoPlot())
}
shinyApp(ui2, server)
我用传单创建了一个闪亮的应用程序,它运行良好。
library(shiny)
library(shinythemes)
library(leaflet)
ui2 <- fluidPage(theme = shinytheme("united"), tabsetPanel(
tabPanel(
titlePanel("titel"),
mainPanel(
leafletOutput(outputId = "mymap")),
sidebarPanel(
fluidRow(
dateRangeInput("a", h4("date"),language = "en",separator = " to "),
selectInput("select", h4("location"),
c(data8$city)),
submitButton("search"))
))
)
)
server <- function(input, output) {
popupa <- paste(titel)
output$mymap <- renderLeaflet({
leaflet(data8) %>%
addTiles() %>%
addMarkers(lng = ~lng, lat = ~lat, popup = popupa)
})
}
shinyApp(ui2, server)
但目前我正在尝试在我显示的位置上添加 dateRangeInput
到 filter(date_start)
。但我不知道如何将我的 dateRangeInput
和 selectInput
连接到服务器部分的传单功能。此外,在地图下方应该有一个 table,其中包含从地图中筛选出的位置 - 这可能吗?
我使用的数据框如下所示:
title=c("Event1","Event2")
lng=c(23.3, 23.3)
lat=c(30, 40)
city=c("Berlin", "Hamburg" )
zip=c(39282, 27373)
date_start=c("2018-05-28","2018-05-28")
date_end=c("2018-06-27","2018-08-03")
data8 <- data.frame(title, lng, lat, city, zip, date_start, date_end)
有谁知道如何完成这项工作?感谢您的帮助! 问候
你可以试试这个:
ui2 <- fluidPage(theme = shinytheme("united"), tabsetPanel(
tabPanel(
titlePanel("titel"),
mainPanel(
leafletOutput(outputId = "mymap"),
dataTableOutput("mytable")),
sidebarPanel(
fluidRow(
dateRangeInput("a", h4("date"),language = "en",separator = " to "),
selectInput("selectLoc", h4("location"),
as.character(data8$city)),
submitButton("search"))
))
)
)
server <- function(input, output) {
popupa <- paste("titel")
datatoPlot <- reactive({
date_start <- as.character(input$a[1])
date_end <- as.character(input$a[2])
data8$date_start <- as.Date(data8$date_start, format = "%Y-%m-%d")
data8 <- data8[as.Date(data8$date_start) >= date_start & as.Date(data8$date_start) <= date_end, ]
data8 <- data8 %>% dplyr::filter(city == input$selectLoc)
})
output$mymap <- renderLeaflet({
leaflet(datatoPlot()) %>%
addTiles() %>%
addMarkers(lng = ~lng, lat = ~lat, popup = popupa)
})
output$mytable <- renderDataTable(datatoPlot())
}
shinyApp(ui2, server)